Why wouldnt you use a dual wiper pot? So that way you can control both channels with one knob and know they both have exactly the same settings. I guess its because "it's not available at Radioshack"
the reason why he uses two pots instead of one dual pot is that one pot controls the high frequencies and the other controls the low frequencies. this makes a sort of basic equalizer allowing for the bass boost/reduction. a dual pot would take away this function, reducing this setup to an overly complex amp. hope this helps.
As far as I can tell that won't split into a high and low frequency branch, just a high frequency branch, and a branch with all frequencies. To filter high frequency (obtain low frequency) you would generally use an inductor, in the same way the capacitor was used to filter low frequency.
Thank you so much for this great video... I just build one same for myself.. with 5 volt and 9 volt dual voltage control... for low and high impedance headphones... It is just awesome...It is a classic product.. LM368 is not the best one but it is great for its simplicity... It has a 3 stage class AB amplifier with Lin Topology... 1) It has a simple differential input stage with emitter followers 2) a voltage amplification stage 3) and a output class AB stage with a compound PNP Transistor... 4) Internal feedback and gain control is awesome 5) Fixed Gain of 20 (great for headphones) Last but not the least : The Zobel Network at output and the BIG MUFF PI TONE control system at the input makes it classic. But I have one question please help me.. Which impedance headphones are best for this little classic piece... because 4.5 volt amplitude is not good(I am also use a 2.5 volt setting ) for 32 Ohm impedance... Voice coils will be getting heated due to large current flow... and for long use may be the cone will start damaging... 2.5 volt is also high for some low impedance headphones... Please suggest me...
The LM386 was never meant to be a headphone amp. It's a really low quality "amp" that can pump low quality audio into a low quality low power (350 mw) speaker, like in the old cheap transistor radios. Build it if you like but only if your're not serious about headphone sound.
I'd control it digitally way before the signal goes into the amp. It could be an over kill, but that's the only solution I've done; I'm only a hobbyist when it comes to electronics but I've done my share with digital circuits; I'm a programmer by trade. I recently purchased a sounds system for my PC and the sub-woofer had potentiometers as additional controls. The amount of noise was unbearable; once I took them out I've never had noise. The reason I knew to take them out was from experience.
What's the point of printing a specific type of PCB when you are going to run the wires around like that? you could have used a normal type of circuit board, right?
Or you can just buy a portable DAC/amp for the same money that will offer infinitely more sound quality improvement, and use EQ to get a better bass boost.
You two obviously don't understand this thing at all. Active, hardware bass boosting sounds ten times better than equalizing it in your computer software.
DaveK183 I have a stereo amplifier with a bass boost 'loudness' feature, no. It's not better as it sound exactly the same. If your speakers/headphones don't have enough bass then you bought the wrong headphones/speakers for your personal preference.
So, I'm gonna build this, but I'd like to build it using a stereo pot. I'm not sure what I'm looking for, as most schematics say "stereo" or "dual" etc, not mentioning other technical data. I've done a search on my electronics supplier page for "potentiometer" - could someone with knowledge please find me a couple of alternatives which fulfils the stereo requirement? www.elfa.se/elfa3~eu_en/elfa/init.do?cat=0&sq=potentiometer&sel=2&solrRows=10
put a simple preamp stage before it, put a pair of 8 ohm speaker after it, and you may like the power. tda2822 non "m" version has some more power too.
+iceberg789 i want build heaphone amp with schematic from this video. you said that lm386 doesn't sound good, so what opamp that sound good for that schematic? thank you.
Seems like that should work just fine. you just don't have control of both channels, though in this application I can't see a reason you would need to. Unless you only plugged in one speaker at some point, then you could just turn down one channel.
No body wants un-even bass. A double gang potentiometer can also be used to control the over all volume of the output. That way we don't have to use the volume control from the origin.
I ACTUALLY FINISHED IT BUT FOR SOME REASON, WHEN I CONNECT EARPHONES WITH A MIC THE AMP DOESNT WORK VERY GOOD , UNLESS YOU PRESS AND HOLD THE PLAY/PAUSE BUTTON ON THE EARPHONES; THE SOUND QUALITY CHANGES IMMEDIATLY. ITS SO WIERD AND I HAVE NO CLUE HOW TO FIX IT!! HELP
Can anyone please help! I finished making it but i keep hearing static and buzzing sounds along with the music.Any suggestions to fix this?Please help!
it has to do with the power supply, audio amps are very sensitive to their power supply. Unfortunately a 9v battery is not the best solution because it is not regulated.
tfhamilton101 This is using an op-amp and so there should be always at least an 4.8 potential difference, plenty for this power level. 9V batteries are made of 6 1.5V cells, so when you first turn it on you have a 9V potential (with 0V reference level) and it will generally fail at .8v per cell or 4.8V. So unless the battery is down bellow 6, I don't think it's the battery.
tarstarkusz A few months back I did some playing around with the lm386 as an audio amplifier. First I powered it with a 9v battery as seen in this video and there was a lot of high pitch noise and static coming from the speaker. I decided to power the speaker from a 5v usb phone charger and when I did the amplifier had very little static. If you want a noise free amplifier, the power supply should be linearly regulated. However, I do agree with you that AAA cells would be a better solution for this project.
tfhamilton101 You can always drop a 5V regulator on the power into the circuit. Adding a DC-DC circuit would probably raise the complexity too much for the average person. It's possible that a carbon-zinc 9V battery can't deliver the current needed for this project or that the resisters are keeping the current limit on the op-amp too high, though nobody else seems to have the problem (I haven't built this myself). I do wonder if Adrian is trying to use a carbon-zinc 9V? It could be that one of his caps are bad or not connected properly too. That would be the first thing I check.
Dirty or cheap pots can have a bit of static on them, that is true, but good quality ones won't have those issues. And when they do, you can easily replace them later on down the line. I will bet if you bought quality pots online and replaced the ones in your subwoofer it would be fine. But I digress. Yes, a digital potentiometer is a solution, but they are quite a bit more expensive and require a microcontroller and... Just expensive and not a proper solution to the issue of noise.
+NeXTSTORMING well what are you suggesting is more universal? He's obviously not going to list an online supplier that's going to cost $20 to ship a single projects worth of parts internationally, nor is he going to list a possible supplier for every country. By the time your building this you should have the intuition to find a store on your own. And its american content, so its nothing but reasonable for them to list a common american supplier.
+Chris Andonoski yeah, I think the design is just to keep parts simple and easily available from the common hobby stores like RS, but its not ideal and a single pot would not only work but be a lot better for practicality.
Anyone who's tried using good quality studio headphones on low power devices like cell phones and MP3 players know that a headphone amp is necessary, it doesn't matter how good your speakers are if you have no power to drive them properly.
No. A sub woofer with line inputs would have a much better designed amplifier and usually the filtering is done in the stereo so that you are only getting the low frequencies out of the sub output.
ohh ok thanks Justin DiPlacido and Echoz28 i was going to make it today !! because there was no reply .. so i thought of giving it a try !! thanks again
That's not really how it works. The pots at as voltage dividers for the input signal, the reason you have two is because you have to pass two signals both of which need dividing.
NoBudgetTech thats what i was thinking! Haha, single stage op-amp circuit... guess their definition of lo-fi is using a push-pull set of two BJTs hahaha
Evan Johnson LM386 is an audio amplifier chip. Not an Op-Amp. My suggestion would be a TDA2822, stereo, though still not 'quality'. I would replace the pots with a DPST switch and have boost on/off. Use a DPDT switch for 2 positions and off.
ChaoticaExtreme apples to apples. They call it a low voltage audio amp, but functionally it is a high powered, low frequency Op-Amp. It even has the same schematic symbol and differential inputs. Maybe they choose not to call it at op-amp, but I consider it to he one. If it quacks like a duck...
Technically, yes. Let's remember here that op-amp is basically any amplifier with differential inputs, op-amp doesn't mean tiny. A balanced input power amp is indeed a huge op-amp. Just like power amp chips like the TDA2030, LM1875, LM3886, etc... are just high power op-amps. And yes, they have the same schematic symbol often. Technically, every amplifier that has a feedback loop is an op-amp. The LM386 is a high power op-amp with fixed gain, it basically has the feedback loop built in.
If you're using 2 pots to control 2 ears seperately, why not connect both wires to a single pot and get equal amount of bass boost? I first though that the other nub would boost the overall sound and te other one would be bass boost, got dissapointed :P
+MrMats0n if you where to only use one pot you would end up mixing both channels into one and distorting your sound. the only way you could use one pot is to get a stereo pot, which is 2 pots controlled with a single shaft.
With this thing being so damn big, you might want to put 6AAA cells in it instead of the 9V. 9V batteries will have much less energy than 6AAA cells and can still be charged with the scheme shown here assuming you use rechargeable AAA cells. 9V rechargeable batteries are also 7.2V.
Redwan Hasan You would loose the ability to recharge it. You still have the problem of voltage drop, whereas with NIMH, you get a MUCH flatter voltage curve.
Redwan Hasan That would work fine, but it would be more expensive and a charger might more expensive and difficult to find. Are you thinking like 2 18650 cells in series?
Well matter of fact a few hours ago i just finished my project where i have used 2 18650 in series and a LM2576,fixed 5.0V ic, and it might be a bit costly(not much though, 4.0AHr each costs me abt a dollar) but it saved me lot of space. Li ion charging circuits are simple and easy to find too.
I like the effort put into making the graphics in the video very explanatory.
I just completed making this amplifier and I am quite shocked by its performance. Being so cheap it delivers a relatively high-quality sound.
Can we use 32 ohms headphones with this circuit?
I'm addicted to watch these sorts of videos .. Keep going
a00000z100 me too
Why wouldnt you use a dual wiper pot? So that way you can control both channels with one knob and know they both have exactly the same settings.
I guess its because "it's not available at Radioshack"
I tought the same hahaha
If you cross your eyes at the two halves of the pcb in the first segment, it creates a stereo photo. That's some tight component placement.
Wow...a project without the overkill of an Arduino! I can actually give this video a like!
the reason why he uses two pots instead of one dual pot is that one pot controls the high frequencies and the other controls the low frequencies. this makes a sort of basic equalizer allowing for the bass boost/reduction. a dual pot would take away this function, reducing this setup to an overly complex amp. hope this helps.
Side note: great build instruction graphics. Really helped the narrative. Nice work.
As far as I can tell that won't split into a high and low frequency branch, just a high frequency branch, and a branch with all frequencies. To filter high frequency (obtain low frequency) you would generally use an inductor, in the same way the capacitor was used to filter low frequency.
I am wrong, the low frequency branch is being created by grounding high frequencies through the bottom .22uF capacitor. Quite clever.
You could use a 10K stereo pot, and dc power input jack with switch for external dc power or internal battery
What about the usage of other batteries? Also I'd like to see a video for the mint tin being used as a solar charger for multiple devices. Thank you.
Thank you so much for this great video... I just build one same for myself.. with 5 volt and 9 volt dual voltage control... for low and high impedance headphones... It is just awesome...It is a classic product.. LM368 is not the best one but it is great for its simplicity... It has a 3 stage class AB amplifier with Lin Topology...
1) It has a simple differential input stage with emitter followers
2) a voltage amplification stage
3) and a output class AB stage with a compound PNP Transistor...
4) Internal feedback and gain control is awesome
5) Fixed Gain of 20 (great for headphones)
Last but not the least : The Zobel Network at output and the BIG MUFF PI TONE control system at the input makes it classic.
But I have one question please help me..
Which impedance headphones are best for this little classic piece... because 4.5 volt amplitude is not good(I am also use a 2.5 volt setting ) for 32 Ohm impedance... Voice coils will be getting heated due to large current flow... and for long use may be the cone will start damaging...
2.5 volt is also high for some low impedance headphones...
Please suggest me...
Super project! What's the music used in this video?
The LM386 was never meant to be a headphone amp. It's a really low quality "amp" that can pump low quality audio into a low quality low power (350 mw) speaker, like in the old cheap transistor radios. Build it if you like but only if your're not serious about headphone sound.
My local radio shacks don't have most anything for these projects. the bins for parts are mostly empty and not organized
You guys at MAKE sure are talented.
Does anyone even bother to get all the tools and all the components needed to build these things?
i do because i have them available
Hey, can you post a complete list of the components and their specifications ?
I wonder if this could be used in the Monobox speaker, just to control the bass?
nice project :) you can use a dual gang pot for that circuit , it does make sense , and so you can change their volume in sync :D
I'd control it digitally way before the signal goes into the amp.
It could be an over kill, but that's the only solution I've done; I'm only a hobbyist when it comes to electronics but I've done my share with digital circuits; I'm a programmer by trade.
I recently purchased a sounds system for my PC and the sub-woofer had potentiometers as additional controls. The amount of noise was unbearable; once I took them out I've never had noise.
The reason I knew to take them out was from experience.
uhm i have a problem with this one, all done, but when music is not playing there is that little annoying noise, any solutions?
Can I use 32 ohms headphones with this circuit? Can more than one headphones be used with this circuit say 4 headphones in parallel?
Where are you from that there is still a Radio-Shack (r) to go to??? (even in 2013?)
+Krearc Wondering the same thing...
What's the point of printing a specific type of PCB when you are going to run the wires around like that? you could have used a normal type of circuit board, right?
Or you can just buy a portable DAC/amp for the same money that will offer infinitely more sound quality improvement, and use EQ to get a better bass boost.
You obviously don't get the purpose of DIY'ing. It's not about the product, it's about the build.
You two obviously don't understand this thing at all. Active, hardware bass boosting sounds ten times better than equalizing it in your computer software.
its pretty fun building something and using it, its not about saving money or something.
DaveK183 I have a stereo amplifier with a bass boost 'loudness' feature, no. It's not better as it sound exactly the same. If your speakers/headphones don't have enough bass then you bought the wrong headphones/speakers for your personal preference.
GregLH0 Umm, maybe its the same because your speakers can't even play those low frequencies.
Some music has more bass on one side, so to change them independly is pretty good.
Will this boost bass on speakers that normally cannot handle bass?
Okay, how are you supposed to control the project then? What is your solution to the problem of noisy pots?
Wouldn't it be better to use a stereo pot indstead because i don't know why you would want to adjust bass individually for each channel :)
Is there a way to use One pot to change the bass instead of having to match up two?
Yes. Just use stereo pots. It's basically 2 pots with common shaft.
So, I'm gonna build this, but I'd like to build it using a stereo pot. I'm not sure what I'm looking for, as most schematics say "stereo" or "dual" etc, not mentioning other technical data. I've done a search on my electronics supplier page for "potentiometer" - could someone with knowledge please find me a couple of alternatives which fulfils the stereo requirement? www.elfa.se/elfa3~eu_en/elfa/init.do?cat=0&sq=potentiometer&sel=2&solrRows=10
Why not use a double gang potentiometer, allowing both channels to be adjusted at the same rate and time?
Why you use 2 separate potentiometers , not one dual (stereo) potentiometer?
Dude, those are some MDR-7506 (pretty much the same as the MDR-V6s. They have a near flat response, and actually curve UP at sub bass
Why don't you use LM1877?
Cheers from Indonesia
why everyone just makes lm386, it doesn't even sound good.
TDA2822 does work at 5V, also does PAM8403
put a simple preamp stage before it, put a pair of 8 ohm speaker after it, and you may like the power.
tda2822 non "m" version has some more power too.
yeah its a grandpa audio IC
+iceberg789 i want build heaphone amp with schematic from this video. you said that lm386 doesn't sound good, so what opamp that sound good for that schematic? thank you.
tda2822m works at 2v
Seems like that should work just fine. you just don't have control of both channels, though in this application I can't see a reason you would need to. Unless you only plugged in one speaker at some point, then you could just turn down one channel.
No body wants un-even bass. A double gang potentiometer can also be used to control the over all volume of the output. That way we don't have to use the volume control from the origin.
What? if I use one B100k Potentiometer for dual channel, Does it work.
I ACTUALLY FINISHED IT BUT FOR SOME REASON, WHEN I CONNECT EARPHONES WITH A MIC THE AMP DOESNT WORK VERY GOOD , UNLESS YOU PRESS AND HOLD THE PLAY/PAUSE BUTTON ON THE EARPHONES; THE SOUND QUALITY CHANGES IMMEDIATLY. ITS SO WIERD AND I HAVE NO CLUE HOW TO FIX IT!! HELP
or solder both channels to the same poteniometer? (or will that mess things up?)
But it isnt for adjusting high and low frequencies its for adjusting the tone per channel which could work way better with a dual gang pot.
Which is this background music ❓
Thank you guys for this project i made it and its so awesome. Soon i`ll post it on my channel.
Does this also bass cut in addition to bass boosting?
how long you been working on this video?
Can anyone please help! I finished making it but i keep hearing static and buzzing sounds along with the music.Any suggestions to fix this?Please help!
Check all the caps and keep the volume of your MP3 player low.
it has to do with the power supply, audio amps are very sensitive to their power supply. Unfortunately a 9v battery is not the best solution because it is not regulated.
tfhamilton101 This is using an op-amp and so there should be always at least an 4.8 potential difference, plenty for this power level. 9V batteries are made of 6 1.5V cells, so when you first turn it on you have a 9V potential (with 0V reference level) and it will generally fail at .8v per cell or 4.8V. So unless the battery is down bellow 6, I don't think it's the battery.
tarstarkusz A few months back I did some playing around with the lm386 as an audio amplifier. First I powered it with a 9v battery as seen in this video and there was a lot of high pitch noise and static coming from the speaker. I decided to power the speaker from a 5v usb phone charger and when I did the amplifier had very little static. If you want a noise free amplifier, the power supply should be linearly regulated. However, I do agree with you that AAA cells would be a better solution for this project.
tfhamilton101 You can always drop a 5V regulator on the power into the circuit. Adding a DC-DC circuit would probably raise the complexity too much for the average person. It's possible that a carbon-zinc 9V battery can't deliver the current needed for this project or that the resisters are keeping the current limit on the op-amp too high, though nobody else seems to have the problem (I haven't built this myself). I do wonder if Adrian is trying to use a carbon-zinc 9V? It could be that one of his caps are bad or not connected properly too. That would be the first thing I check.
well..what resistance do i need? 100ohms, 10Kohms?
There is no RadioShack in germany :/ no electronics market nearby:(
+TheGreenLift
reichelt.de
conrad.de ist gut
tme.eu
because then you cant adjust the high frequencies separately to the low frequencies?
I wonder if i could build this amp for my old disk cutter, This has base, i like base,,
It may be better to use a potentiometer 2X10K?
If I use a 6watt speaker will it be loud?
Dirty or cheap pots can have a bit of static on them, that is true, but good quality ones won't have those issues. And when they do, you can easily replace them later on down the line. I will bet if you bought quality pots online and replaced the ones in your subwoofer it would be fine. But I digress.
Yes, a digital potentiometer is a solution, but they are quite a bit more expensive and require a microcontroller and... Just expensive and not a proper solution to the issue of noise.
Local radio shack, really because what if your country dosent have RadioShack
+NeXTSTORMING Yeah and with radio shack closing down
+NeXTSTORMING well what are you suggesting is more universal? He's obviously not going to list an online supplier that's going to cost $20 to ship a single projects worth of parts internationally, nor is he going to list a possible supplier for every country. By the time your building this you should have the intuition to find a store on your own. And its american content, so its nothing but reasonable for them to list a common american supplier.
jameco.com?
ALIEXPRESS...
this amp cannot work with the 100 ohm resistor from input to ground, no preamp can drive a such low input impedence.
this will work with a stereo potenciometer for equal bass on both channels
+Chris Andonoski yeah, I think the design is just to keep parts simple and easily available from the common hobby stores like RS, but its not ideal and a single pot would not only work but be a lot better for practicality.
Just build the SSMH 12AU7 tube/fet headphone amp if you wanna build something yourself, they sound awesome.
Lol, I like how he's adding bass boost to one of the best pairs of headphones out there (Sony MDR-7506's) that do a decent job anyway :P
Anyone who's tried using good quality studio headphones on low power devices like cell phones and MP3 players know that a headphone amp is necessary, it doesn't matter how good your speakers are if you have no power to drive them properly.
Agreed :-) I just think it's funny that he's adding bass to a pair that already do a splendid job of representing the lows (shrugs).
+Garrett Mehre beats are shit (headphones)
will it work in a car battery of 12v?
So, that's how the sub woofer circuit works, pretty cool
No. A sub woofer with line inputs would have a much better designed amplifier and usually the filtering is done in the stereo so that you are only getting the low frequencies out of the sub output.
Oh
The chip he needs is the TDA1519A and a double gang POT
thats too powerfull for headphone use typically a headphone uses 10mW max headphone power could be 500mW
and in big 60mm drivers one watt no more
Can I use a 12V adapter with this amplifier?
You can use any voltage from 9 to 35V with voltage regulator 7809.
+Edgar Koterle 35v to 5v is gonna make a LOT of heat
NeXTSTORMING It depends by current.
can u use this for a car stereo ?
no
Yes, but you'll hardly get much sound and it will overheat. Oh and if you're using batteries it's going to be expensive...
ohh ok thanks Justin DiPlacido and Echoz28 i was going to make it today !! because there was no reply .. so i thought of giving it a try !! thanks again
what is the name of the circuit board
My skull Candy headphones has already built in bass amplifier.
why don't just use dual gang potentiometer?
Can Colin make a remake?
Ridiculous! You need to match the pots, i'm lefting now
Olha quem encontro aqui . Faaaallllaa galera do all eletronics !! Curto muito seus vídeos :)
i bet you could wire it so you only need one.
I could. I could also use a dual pot.
yes, when I saw it, I was like seriously dude? WTF??
All Electronics use a dual gang pot
How bout a project so I can use my headphones on my Samsung TV. Now THAT would be useful.
you can use a dual gang pot instead of 2
That's not really how it works. The pots at as voltage dividers for the input signal, the reason you have two is because you have to pass two signals both of which need dividing.
it would be nice if they added a led to the circuit and a switch
LM386 for a "high quality" headphone amplifier? You've got to be kidding me...
NoBudgetTech thats what i was thinking! Haha, single stage op-amp circuit... guess their definition of lo-fi is using a push-pull set of two BJTs hahaha
Evan Johnson LM386 is an audio amplifier chip. Not an Op-Amp. My suggestion would be a TDA2822, stereo, though still not 'quality'.
I would replace the pots with a DPST switch and have boost on/off. Use a DPDT switch for 2 positions and off.
ChaoticaExtreme apples to apples. They call it a low voltage audio amp, but functionally it is a high powered, low frequency Op-Amp. It even has the same schematic symbol and differential inputs. Maybe they choose not to call it at op-amp, but I consider it to he one. If it quacks like a duck...
Evan Johnson So if I buy say, a PA amplifier with balanced inputs, I've actually bought a discrete op-amp....
Technically, yes. Let's remember here that op-amp is basically any amplifier with differential inputs, op-amp doesn't mean tiny. A balanced input power amp is indeed a huge op-amp. Just like power amp chips like the TDA2030, LM1875, LM3886, etc... are just high power op-amps. And yes, they have the same schematic symbol often. Technically, every amplifier that has a feedback loop is an op-amp.
The LM386 is a high power op-amp with fixed gain, it basically has the feedback loop built in.
If you're using 2 pots to control 2 ears seperately, why not connect both wires to a single pot and get equal amount of bass boost? I first though that the other nub would boost the overall sound and te other one would be bass boost, got dissapointed :P
+MrMats0n if you where to only use one pot you would end up mixing both channels into one and distorting your sound. the only way you could use one pot is to get a stereo pot, which is 2 pots controlled with a single shaft.
jack machen Thats basicly what I meant
BUT WAIT... where does the arduino go?? im so lost without it...
Why not just make a cmoy amp?
it would work out cheaper buying a mid to high range set of headphones. if you need to buy all the tools that is.
With this thing being so damn big, you might want to put 6AAA cells in it instead of the 9V. 9V batteries will have much less energy than 6AAA cells and can still be charged with the scheme shown here assuming you use rechargeable AAA cells. 9V rechargeable batteries are also 7.2V.
how about lithium :p
Redwan Hasan You would loose the ability to recharge it. You still have the problem of voltage drop, whereas with NIMH, you get a MUCH flatter voltage curve.
Im talking about rechargeable li ions. Those are much better than NiMH in faster charging and higher capacity aspect.
Redwan Hasan
That would work fine, but it would be more expensive and a charger might more expensive and difficult to find. Are you thinking like 2 18650 cells in series?
Well matter of fact a few hours ago i just finished my project where i have used 2 18650 in series and a LM2576,fixed 5.0V ic, and it might be a bit costly(not much though, 4.0AHr each costs me abt a dollar) but it saved me lot of space. Li ion charging circuits are simple and easy to find too.
hello friend can use it to connect an electric bass or need to change some resistance or capasitor ???
This looks like a mono amp?
OMG....
They said like 10 times Left and right...
It's kind of like building the mono box speaker amplifier
What is your reasoning behind this?
Procedure was not clearly described
Nice job! Thank you.
I'm just going to make,some of these and add 47 more from Amazon and then I will have the perfect headphones for freaks timmy trumpet
Great video!!! But....if you have android,just use viper and some decent headphones;)
Or you could just set different equalizer settings...
Nice work
yea because base in ur left ear more than ur right is nice.....
i dun get it
TDA2822m would have been a better choice for a headphone amp
I agree !!! an minor costs
how much capacitor volt?
220uf--v
100uf--v
I think 16v
nice bass
bappa bera chutiya
potentiometers always introduce noise
You're right this project could be done way better
How much does this cost and does it rely work because I don't want to waist money on something that won't work
Don't worry, you can't waist your money because that would be ridiculous
wonderfull project i made it
i'm buying one, can anyone sell me one of these? plix?